Improvement in glaziers  square and rule



UNIT STATES PATENT OFFICE.

JOSEPH M. KURTZ, OF WESTON, MISSOURI.

'IMPROVEMENT'IN GLAZIERS SQUARE RULE.

Specification forming part of Letters Patent No. 208,104, datedSeptember 17, 1878; application filed August '2, 1878.

To all whom it may concern:

Be it known that I, J OSEPH M. KURTZ, of Weston, in the county of Platteand State of Missouri, have invented a new and Improved Glaziers Squareand Rule, of which the following is a specification:

The object of my invention is to furnish a square for use in cuttingwindow and picture glass to any desired size, which square shall becompact in form and capable of extension, and shall have a movable guideand stop for the edge of the glass, to prevent it from slip- Myinventionconsists in a rule having inches and parts of inches marked upon it, andprovided with an arm. at a right angle, to form a square. The rule orbase has an extensionslide at one end, which may be clamped in position,and it is also provided with a movable guide, which may be clamped atany point on the rule, and forms a stop for the glass, while the arm ofthe square serves as a straight edge along which the cut is made.

In the drawing, Figure 1 is a plan view of my improved square, as laidupon a pane of glass and set for cutting the same eight inches wide, theglass being shown in dotted lines. Fig. 2 is an edge view of the square,and Fig. 3 is a side view of the guide and stop.

Similar letters of reference indicate corresponding parts.

The square is to be made of wood or metal. It consists of a rule orbase, a, and a rightangled arm, b, extending from one end. The arm bisof thinner material than the rule a, and is mortised into the rule topermit the edge of a to come squarely against the glass when the arm I)is laid on the same.

Upon one side of the rule ainches and parts of inches are marked inpermanent lines, and numbered from 1 upward, commencing next to the arm12. The first inch is a full sixteenth short, to allow for thecutting-diamond, which cuts that distance outside of the straight edge.

e is an extension-slide that fits into a longitudinal mortise in rule a,at the end opposite to the arm I), and may be slid easily in and out ofthe mortise. It is provided with a head,

0, corresponding with a in thickness, and cont ing flush with the sameat the edges.

f is a narrow plate on the end of head '6,

and projecting slightly at the edges of the head.

The surface of slide 0 is marked in inches similar to the rule (1-,commencing, next to head 6, with the number next above the last one onthe rule.

9 is a serrated metal plate secured upon one edge of slide 0. h is aspring secured in a mortise in the edge of rule to adjacent to theserrated edge g, and having its free end serrated on the side toward g.i is a cam-lever pivoted in the said mortise, in such position that whenit is turned down flush with rule a the cam of iwill bind the spring -hagainst the serrated edge g, and hold the slide a firmly.

By raising the lever t the spring is relieved, and the slide can beadjusted.

7a is the guide, which is adapted for application to the rule a or tothe head 0 of the slide. It consists of a plate with flanged ends to fitover the edges of the rule a, and it is clamped to the rule by athumb-screw, l, 'in' the flange which comes upon the outer edge ofrulea, and which screw lbinds a spring, m, against the edge of the rule.It may also be clamped to the head e in a similar manner.

a is a stop projecting from guide 7s, at the inner edge of rule a. Thisstop may be formed with or attached to k.

If the glass is to be cutfour inches, the guide It will be clamped atthe four-inch mark on a. The square is then to be laid on the glass,with the edge of rule a against one edge of the glass, and the stop itagainst the adjacent edge of the glass. The outer edge of arm I) willthen serve as the line to cut by.

When the glass is to be cut of a length that requires the use of theslide, the latter is to be drawn out and clamped, and the guide 7;secured upon head 0, as seen in Fig.v 1. In this case the end of therule a will be the guide for the number of inches, the guide 70 and stopa serving only as a stop for the end of the glass. Guide k is just thewidth of the head e, and when placed against the projecting ends ofplate f, and clamped, stop n comes to the proper place for the edge ofthe glass.

7 Having thus described my invention, I claim as new and desire tosecure by Letters Patent 1. The herein-described glaziers rule, providedwith an adjustable notated slide and a guide, h k l m, secured on heade, against projecting ends of plate f, said guide having a stop, n, asand for the purpose specified.

2. The combination, with slide a, of the serrated plate g, end-serratedspring h, and the cam-lever 17, as and for the purpose set forth.

JOSEPH M. KURTZ.

Witnesses:

LOUIS P. ILKENHAUS,

MARKUS EGGERT.

